Master controller are used for operation of contractors equipment for controlling E.O.T cranes and rolling mills drives. The controllers are made in dust proof enclosure. Technical Details : Body material - steel sheet Degree of protection - IP-41 / confirming to IS 13847 (1) 1993. Mounting position - horizontal / vertical Contact material - silver / Cadmium Rated voltage insulation - 500 V AC Frequency of operation - 1000 switching per hour